Locating jig device for use in drilling holes in racket heads



H. W. HALL Feb. 10, 1948.

LOCATING JIG DEVICE FOR USE IN DRILLING HOLES IN RACKET HEADS Filed Nov. 30, 1945 2 Sheets-Sheet 1 o o [3011] o 0500a 44M g gjgw H. W. HALL Feb 10, 1948.

LOCATING JIG DEVICE FOR USE IN DRILLING HOLES IN RACKE'I HEADS Fil'ed Nov. so, 1945 2 Sheets-Sheet 2 Patented Feb. 10, 1948 IIOCATING' 'JIG'DEVICE FORT'USE-IN DRILL? ING' 'HOLESJIN' RACKET.'HE

lioracetW. Hall, Newton, Massa. Application November 30, 1945; Serial N.=631,915I..

Thisdnvention relates to a locating jig device; particularly toone"that willautomatically locate an article; such as -a p1aying'racket; in a predeternnned positiono The pnincipal object of any invention is to pro vide a locating jig-whiclr correctly locates the part-of the artlcletoibe-drilled the-aid of the article itself."

thanv drilling: of articles-= suchas tennis rackets; itris important that the holes drilled therein ,tozreceive:the=1strings, shall be: located at predetermined points at boththezinsideand outsideoof' the:bowheadlot-zthevracket; In orderto accomplish this previonslyLth-e operator-depended upomhisreyei andlsometimessannarkawasmadeson thertop: :ofqfarr iouts-idezjigcby: which" the drill; was aimed tocbecsune;=thedireetiorr of the drill asit eutta'holeinxthe bow; headzwas: correct.

My;invention;,-eliminates this dependency upon the 5 eye; ,sincevitl is oomy; necessary to 3 start the drill at lthescorrect ippint landvmy xdevice; with the aid of the article to be drilled, will correctlyposition the latter.

The: foregoing and otherobjects. whichswill appear assthel nature, oi the invention r issbetter understood may a be. accomplishedby apconstructinn d combination and-arrangement of parts, such asis. disclosed-thy the drawings and specifications. The vnature of the inventionis such as tosrender it susceptible ,to various, changes; and modifications,u,and,i therefore,-, I. am -not to be limitedVtotsaidldisclosnre; but .am. entitled to all such changes :therefrom astfall within thescope ofmy claimss Im the. drawings;

Figure. :1 .hissa-aplan view vof the work-board of myillocatmg jig device vand a drill, showing a; play in zgracketaon said, 'workl. board having a, hole drilledthereins g Fig-uneztis a .right side elevational view.- of said worktboardu s t Figure isa-side elevationalviewoi. a locating memberior myworhboard. v

Eignresl lis aaside elevational view, partly in section; or-myJocating Jig device showing a play: ingcracket on; thework board with. a. drill extendingthrou h thebowheadlthereofr Fignre bg'aissa front selevational view... oi my, de-v vices Fignrefi .isa. :Eragmentarylsectional View taken onttheline 6+6 of Fig-line 5.. As illustrated, my locating; jig device/has a stationary-base lfltfortsuppprt which. has allatere allyiextendingal pntion' J52..that rests on. the floor, and from which a vertical portion l'4 extends up- 3 Claims; (01. 144-93) l 2 wardly. Alsoanother vertical portionlfiaktends upwardly; An arm '|'8"'extends from saidtvertical portion [4; and hasla bearlngj ortion 19 atone end.

Additional supporting means 2fliare vertically movable with respect 'tosaid base-l0; havingside portions; 22 and 'V-shapedwextensions 2! at both sides thereof whiclrpermit said support 20*tc slide. vertically on" the-surfaces of "said vertical portions between two guide'stripsldwhich are fastenedjto saidvertical portion 14 by bolts 28.-

In said upwardly extending portion lfi a lead screwBOis threaded which extends to and'isheld loosely in .a boss 32; that is part of "said-supporting means 20', b'y'mean'sof "a. pin 33 'in-a roove 34 in said boss 32. Said'lead screw "30 is thereby permitted to revolve in said boss. 1

Through .a' hole 38*i1ipsaid bearingyportion I 9 and 'also through another "bearing portion I 9d of said vertical portion l '6 a: shaft- 3 8 -=extends on the end of which is a'miter tgearld-held thereto-bye pin 41. It meshes with another-miter-gear42 which is threaded lOn thesaid-le'ad screw 30 A hand wheel 44'is fastened to said shaft -38"; rotation of 'whichwill raise or lower said supporting means 20as desired.

In saidrsupport "20"two"grooves-21 are provided in which a slidable; Work supporting structure 46 is slidably mounted that *can'mcvef-orwardly and frearwardly bythe operator as desired." At the .front portion. of 'said' structure 46*are two b'earing members 48 to which-is 'pivotally mounted a work board foundation --member 50*by means of pins 5 I, thus permitting-said workboard' mem her too pivotally move=upwardly and downwardly to the desired 'angletby theoperator; Averier attachment 52 fixed to said supporting structure 50 serves as a guide immoving said-work board foundation member 50 to a predetermined position. A clamp.screw-extends through-aslot 55 in said vernier attachment '52; being threaded into .a said slide portion" 22. Kris preferable to have a said vernier attachment "on eachsaid side portion 22, as shown'in Figured; When it is "cor rectly marked "a. predetermined slant of the work board '56, later described, can be obtained by merely pivotally moving saidwork board'foundation member 50 so that the point on said'vernier is oppositea certain marking; ona, said side *portion 22.

Resting on said workboard foundation "503s amember 50. Mounted upon the surface 60 of said work board 56 are exterior locating members 62 which are shown attached thereto by bolts 63 which extend through holes 64 in said foundation member 50 and are tightly held in predetermined positions by wing nuts 65. Said holes 64 are provided frequently, as shown in Figures 1 and 5 of the drawings, so the position of said locating members 62 may be changed when desired. Said members 62 have a perpendicular wall portion 14 at one end that serves as a step, and an inclined surface 15 is at the opposite end, as best shown in Figure 3 of the drawings. The racket handle H, when in a predetermined position, bears 7 against said stop or wall portion 14, and when movement from one location member 62 to an- 4 to be drilled, which in the case of a playing racket is a handle H. Said handle H extends to or beyond said exterior locating members 62, which are in predetermined positions to insure the correct location of the holes drilled in said racket bowhead, since when said handle H bears against the straight bearing surface 14 of a certain said locating member 62, the hole drilled in said howhead will extend therethrough in a predetermined position. For instance, the first hole drilled in the racket R will be near where the handle H adjoins the bowhead, and which for convenience will be referred to as number one hole. The first other is made said handle H is slid upsaid in-.

clined surface 15 and into contact with said stop portion.

An intermediate or of said work board 56, is preferably formed by a separate member 66 that is shown raised slightly above the surface of the adjoining portions of said board and is preferably made of a more durable material, such as a hard fiber, than other portions of saidboard 56, since the principal portion of thearticle or work R to be drilled rests directly thereupon. The said portion 66 has a cut-out portion 61 at the front for convenience of the operator and an opening 68 therein to allow a drill 10 and a chuck 'Il therefor to extend therethrough and drill the article R. This head positioning portion 66 of my work board 56 is spaced from said locating member 62 a substantial distance so that a part of the article not to be worked upon is in contact with said members 62.

Set in said work board support 50 is a pin 12 against which said article R'is pushed during the drilling operation, thereby causing said work supporting structure 46 to slide rearwardly, as will be explained more fully.

Said drill chuck H is set in a rotatable, but otherwise stationary shaft 16 that is supported in bearings 18 in supporting posts 86 that may rest on the floor. Any Well known motor M or the like will serve to rotate said drill shaft 16 by means of a belt 82 and pulleys 84 as shown in Figure 4 of the drawings.

Set in said work supporting structure 46 is an extension portion 81 to which a coil spring 86 is attached which extends therefrom to a projecting member 88 -on said supporting means 20. Said spring normally holds said supporting structure 46 in inoperative position so that the said drill 12 is out of contact with the work R, but when said work or article R is pushed against said pin 12 said structure 46 is moved rearwardly and said spring is put under tension as illustrated in Figure 4 of the drawings and thus it automatically causes said structure 46 upon release, to slide back to normal position.

In operation, my locating jig device as illustrated, is used to move a tennis or other playing racket R into contact with the rotating drill Hi to thereby bore holes through the bow head of said racket R, through which strings later extend. Said holes are bored through said bowhead from the inside to the outsideat an angle, hence said work board 56 is in an inclined position. The inside surface of. said bowhead has prick punches therein to indicate the starting point of. the drill T0. 7

My jig device is adapted for use'with articles that have an extension portion beyond the part head-positioning portion locating member starting leftwardly at the front of my work board 56, is in a predetermined posi tion'so that when said handle H bears against said stop portion 14 the position of the hole drilled in said'racket bowhead will be correct, and all the operator has to do is to start the drill at the prick point for said number one hole, the slant of said work board 56 being in the desired position so the slant of the hole will be as desired.

It will thus be seen that the operator 'merely' has to push the racket against said pin 12 to force it on said sliding structure 46 up to said drill 10 and see that the drill starts at the cor rect or predetermined pin point on the racket, and a perfectly located hole will be drilled. Pressure on said racket R is thereupon releasedand said spring 86 draws'said sliding structure 46 away from said drill to normal position, whereupon said racket handle H is slid over the slanting surface 15 of the next said locating member 62 until it rests against the said stop portion 14, and thus the racket is positioned correctly for drilling of the second hole in said bowhead. This operation is repeated until the holes in said racket bowhead have all been drilled. In Figure 1 of the drawings the racket H is shown positioned to have the third hole in the racket bowhead drilled, said handle H bearing against the third said 10- eating member as shown.

What I claim is:

1. A locating jig device for use with a drill to drill holes in the head of an article that embodies a handle and said head, comprising a work board on which the article to be worked upon is adapted to be supported, and supporting means for said work board, said work board embodying a head-positioning portion at an intermediate portion thereof adapted to receive said head to be worked upon, and upstanding, locating members attached to said work board and spaced outwardly beyond said positioning portion at various distances and angles from the said holes being drilled andadapted to selectively engage said handle 'whi1e said holes are beingdrilled.

2. A locating jig device for use with a drill to drill holes in the head of an article that embodies a handle and said head, comprising a work board on which the article to be worked upon is adapt ed to be supported, and supporting means for said work board, said workboard embodying a head-positioning portion at an intermediate portion thereof adapted to receive said head to be wozked upon, and upstanding, locating members attached to said. work board and spaced outwardly beyond said positioning portion at various distances and angles from the said holes being drilled and adapted to selectively engage said handle while said holes are being drilled, said work board having a cut-out at the front thereof which extends from the front extremity of said work board to said positioning portion.

upon is adapted to be supported, and supporting 5 means for said work board, said work board embodying a head-positioning portion at an intermediate portion thereof adapted to receive said head to be worked upon, and upstanding, locating members attached to said work board and spaced outwardly beyond said positioning portion laterally and rearwardly thereof at various distances and angles from the said holes being'drilled and adapted to selectively engage said handle while said holes are being drilled,

said laterally spaced locating members being spaced from said positioning portion a greater distance than are said locating members spaced directly rearward.

HORACE W. HALL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,252,584 Kethley Jan. 8, 1918 1,270,496 Cimaglia June 25, 1918 146,246 Gardner Jan. 6, 1874 570,197 Black Oct. 27, 1896 587,993 McCormick a--- Aug. 10, 1897 32,550 Fitts June 11, 1861 363,164 Nash May 17, 1887 1,779,289 Pritchard et al. Oct. 21, 1830 1,839,177 Pritchard et a1. Dec. 29, 1931 1,937,147 Hall Nov. 28, 1933 1,969,740 Fitzpatrick Aug. 14, 1934 623,560 Read Apr. 25, 1899 700,000 Young May 13, 1902 1,444,075 Jensen Feb. 6, 1923 

